Blow-off apparatus for boilers



- P 28, 1931. R. R. WATERMAN 1,802,590

BLOW-OFF APPARATUS FOR BOILERS I Filed Aug. 11.. 1926 IN V EN TOR. Russell R. Waferimfl BY an m ATTORNEY Patented Apr. 28, 1931 UNITED STATES RUSSELL n. WATERMAN, F LONG BEAGHQCALIFORNIA, AssIGivon r0 FARMERS NATIONAL BANK OF GREENVILLE, OHIO OF GREENVILLE OHIO, A CORPORATION OF OHIO, TRUSTEE BLOW-OFF APPARATUS on noI LEns Application filed August 11, 1926, serial $0,128,618. H j c v v I 3?) of the casin The blow-off valve is My invention relates to blow-off apparatus for boilers.

The principal objects of my invention are; first, to provide a blow-off apparatus so con- 5 structed that it will draw or eject all the water from the boiler pumps and boiler pump lines; second, to provide a blow-off apparatus of this class which is novel in its construction, 7 and, third, to provide a blow-off apparatus 10 of this class which is very simple and economical of construction, easy to install, eflicient in its action, and which will not readily deteriorate or get out of order.

With these and other objects in view, as will appear hereinafter, my invention consists of certain novel features of construction, combination and arrangement of parts and portions as will be hereinafter described in detail and particularly set forth in the appended claims, reference being had to the accompanying drawings and to the characters of reference thereon which form a part of this ap lioation in which:

The igure in the drawing is an elevational view of my blow-off and ejection apparatus showing the same diagrammatically and showing by legends the various elements to which my apparatus is adapted to be connected, some of the parts and portions broken away and in section to facilitate the illustration.

The blow-off valve 1, ejector nozzle 2, ejector casing 3, pipe 4, pipe 5, pipe 6 and valve 7 constitute the principal parts and portions of my blow-off and ejection apparatus for steam power plants.

The water pipe 4:, which conventionally extends from the boiler pump to the preheater or economizer, is ended before it reaches the preheater and the casing 3 is fitted upon its end, the one cross arm or boss 3a of the casing 3 receiving the end of the pipe 5 which is conneoted to the preheater at the conventional connection point for pipe 4. j The pipe 5 extends into the casing 3 and is tapered so as to form the ejector nozzle 2 which ends close to the opposite side of the casing 3, the jet from the nozzle entering a short length of pipe 6 fittedupon the pipe 6;

If a handwater pump is connected to the water piped, 'a valve 7 is fitted upon the hand waterxpump "line, this valve "being closed when the boiler supply pump is used."

preheater in the conventional manner, the

valve 1 is closed and water from the pump.

line 4 then enters the casing-8 from which it passes by means of the nozzle 2 and the pipe 5 into the preheaterin the direction of the arrows A. lVhen the pump and pump lines require draining, the valve'lo is opened, the

blow-off pressure from the boiler through the preheater passes from the preheater through thexpipe 5 and the nozzle 2 into the casing 3. Because the pipe 6 is placed opposite the nozzle'2, the jet or pressure from the nozzle 2 enters thepipe Bpassing through the valvelin the direction of the" arrow B. This causes a suction in the pump and pump 'line4'in the direction of the arrow C.

Though I have shown and described a particular construction, combination and arrangement of parts and portions, I do not wish to be limited to this particular construction, combination and arrangement, but deisire to include in the scope of my invention the construction, combniatlon and arrangement substantially as set forth in the appended'claims.

' Having thus described my invention, what secure by Let-- i hen it is desired to pump water to the V p1pe communicating with said casing at the side of the nozzle, and a discharge water pipe communicating with said casing in alignment with said nozzle and toward which said nozzle is directed, said discharge water pipe being provided with a blow-ofi' valve.

2. In a blow-01f apparatus for boilers, the combination of a preheater supply pipe, said pipe being provided with an ejector nozzle on its extended end remote from the boiler, said nozzle having a restricted end directed away from the boiler, an outlet pipe in alignment therewith and toward which said nozzle is directed, a casing surrounding the adjacent ends of and supporting said nozzle and said discharge pipe and-forming an ejector therewith, and a boiler feed pump pipe connecting with said casing at the side of the nozzle. 7

3. In a blo'w-ofi' apparatus for boilers, the combination of a preheater supply pipe, said pipe being, provided with-an ejector nozzle on its extended end remote from the boiler, said nozzle having a restricted end directed away from the boiler,.an outlet pipe in alignment therewith and toward which said nozzle is directed, a casing surrounding the adjacent ends of and supporting said nozzle and said discharge pipe and forming an ejector therewith, alboiler feed pumppipe connecting with said casing at the side of the nozzle, a hand pump pipeconnected with saidboiler feed pump pipe, and a valve in said hand pump pipe.

4. In a blow-ofi' aparatus for boilers, the combination with a boiler preheater supply pipe, of an ejector in connection with the preheatersupplynpipe, a boiler pump pipe connected with the ejector, an outlet pipe in connection with the ejector, and a. blow-01f valve in said outlet pipe, the flow of water from theboiler pump pipe being normally from the latter to the preheater supply pipe through the ejector when the blow-off valve is shut oily but fromth'e boiler pump pipe to the outlet pipe when the valve is open.

5. Ina blow -ofl' apparatus, the combination with a boiler supply conductor and a boiler feed pump conductor, of an ejector nozzle on the boiler supply conductor, a caszle, said boiler feed pump conductor communicating with the casing at the side of the nozzle, and a discharge conductor connected to and extending from the casing-in alignment with the nozzle, the nozzle onthe boiler supply conductor being directed toward the l discharge conductor.

In testimony whereof, I have hereunto set my hand at. Los Angeles, California, this 20th day of July, 1926.

RUSSELL R. WATERMAN.

111g enclosing the discharge end of the Inozf 

